It doesn't look like these eggs are going to hatch... but another option is to go to the local Tractor Supply or a local feed mill and get a few day old chicks to slip under her. If you keep her on ping pong balls till you get the chicks she shouldn't know the difference. Just swap them out at night and watch her and the little ones first thing in the morning in case there is any conflicts. Hens frequently are given 'foster chicks' when their eggs fail to hatch.My broody went out for an outing so I grabbed all of her eggs and candled them all. Here is a pic of one of the eggs 4 of them look like this, one has a smaller air sack. Sorry it is hard to see....about half of the egg is dark and the other half is clear like an air sack? 2 of the eggs were glowing all yellow so I broke them open in the burn barrel and they were not alive. No development at all just yolk. So now I am down to 4 possible viable eggs. What do yall experts think????? Are these 4 any good or should I get rid of them and get my broody back to normal life????
Advantage to giving her day olds is it means she can be done sitting and will start getting out and about and eating normally again, but risk is that if they don't take to each other then you will need to keep the little ones in a brooder yourself.
You can give her more eggs, but be very careful that her body condition will allow her to sit for another 3 weeks and stay healthy.